I don't feel any emotional connection with my boyfriend anymore. What should I do?

We have been together for two years, and almost a year ago it has become a long distance relationship because of him going to college. It's been really hard, and recently I have started to feel really far away from him emotionally and detached. When I saw him a couple weeks ago, I didn't even feel happy or excited to see him. I wasn't upset either, just indifferent. What do I do to fix this????? I still love him and want to be with him; I just don't know what to do to feel more connection with him. I guess it's just that my emotional needs aren't being met.